Allis Chalmers HD20
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| Production | |
| Manufacturer | Allis Chalmers |
| Agricultural Crawler tractor | |
| Built in Springfield, Illinois, USA | |
| Total built | 3,100 |
| Allis Chalmers HD20 Engine | |
| General Motors 10.8L 6-cyl diesel | |
| Fuel tank | 120 gal 454.2 L |
 Engine details ... | |
| Allis Chalmers HD20 Transmission | |
| 2-speed torque converter | |
 Transmission details ... |
| Allis Chalmers HD20 Power | |
| Engine (net) | 175 hp 130.5 kW |
| Drawbar (claimed) | 117 hp 87.2 kW |
| Drawbar (tested) | 116.7 hp 87.0 kW |
 Performance test details ... | |
| Mechanical | |
| Drive | crawler |
| Open operator station. | |
| Dimensions & Tracks | |
| Weight | 41000 lbs 18597 kg |
| 24-inch tracks | |
 Full dimensions and tracks ... | |
| HD20 Serial Numbers | |
| Location: | Steering clutch housing or instrument panel |
| 1951 | 3001 |
| 1952 | 3828 |
| 1953 | 4923 |
| 1954 | 5737 |
FAQ: How to read a serial number table. | |
| References | |
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| HD-20 Diesel Tractor published in 1952, by Allis Chalmers | |
| HD-20 published in 1953, by Allis Chalmers |
| Page information | |
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| Peter Easterlund - owner/author | |
| This machine's data modified on December 2, 2025 |